In an interview with WSJ's David Wessel, Former Treasury Secretary Robert Rubin tells why the impetus behind China's economic growth so far won't necessarily be the impetus in the future.

This transcript has been automatically generated and may not be 100% accurate.

the ... I ... you ... people Iceland most forceful ... and most persuasive when he talked about China ... the deal is the issue was actually not tissue growth and ... the ... bite ... that ... China since we perform began in nineteen seventy eight he basically had an export and investment led ... strategy ... and it's been Morsi successful cleanup ... but that strategy ... in the Chinese will ... agree with them not to say ... is not a sustainable basis for Chinese growth going for there to domestic demand with plant growth rather ... than in their new five-year plan ... but the question is ... what will happen as though as the reformers try to move in that direction ... and a vested interest for the tremendous political and economic besting if you will in the status quo what will happen is the outcome of of of that secondly ... they now have ... quite large middle class ... so that an alarming situation where the great pumpkin people every day are struggling to live ... but you have a middle class ... that as a consequence of not having moved from the struggle ... much more focused on issues of use to be the environment corruption and ... inequality ... will and so forth ... that is also pretty excited tension the government had to do with the for ... the bulk of perspective face who in many ways to a new set of issues ... well built ... they've been so successful so far that seems to me ... it is probable maybe probably are the probable ... that they will continue to be successful in dealing with their issues but they are a different set of issues that have passed